What does the military term baseline sustainment level refer to?

I'm working on a war series and want to be accurate with everything regarding the military from Special Operations and so on, So it would be much appreciated if anybody knows what the aforementioned term refers to. God Bless and may peace be with you all:)What does the military term baseline sustainment level refer to?Baseline sustainment level refers to the reccomended minimum amount of whatever youre talking about (production, supply, new personnel) that it takes to maintain the current level of whatever else youre talking about (combat capability, ammunition supply, sortie rate, casualty rate, etc.)